SBC 400 to 87 iroc
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Joined: Jul 2003
Posts: 130
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From: Spokane,Wa
Car: 84 T/A, 87 iroc-z, 86 turbo z-28.
Engine: 5.7, 5.7, 6.6
Transmission: t-5, 700r4,manual shift th350
Axle/Gears: 3.73, 3.52, 3.23
SBC 400 to 87 iroc
I want to install a 400 sbc in my iroc but i want to use my stock tpi setup. it looks like i may need to use my heads off the 5.7L but that will raise the compression ratio a bit, and if the accessory belts will be year correct for that year? and will the oil cooler will bolt up? i have the moates pocket programmer. and lastly is it worth it? i want it to look like a stock 350 (sleeper) under the hood.
Joined: Mar 2000
Posts: 43,187
Likes: 42
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
If the 400 has dished pistons, the 64cc L98 heads would keep compression reasonable.
A 350 taxes the flow capability of TPI, a 400 will just make it that much worse. But, it should have a little more torque/power.
A 350 taxes the flow capability of TPI, a 400 will just make it that much worse. But, it should have a little more torque/power.
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